If x+y+z=5 and xy+yz+xz=3, what is the max and min of z?

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Today's question is "If x+y+z=5 and xy+yz+xz=3, what is the max and min of z?"-- Two ways to solve this question and the first way is to create a function!

Please comment below if you have any questions or any other math problems you would like to share!
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I am 15 and I hope I can help more people with math and I hope more people like math!!

Anna Muyan Li
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